Retro Games THEA500 MINI - Auto Centre; Crop Rectangle

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The size of these borders will aect how big the image appears on the TV,
according to the scaling chosen in Display options. THEA500 Mini provides
settings that can help manage the size of the image, and an Auto crop feature
to make this easier to congure.
Auto centre
It is common for the image to be o-centre in Amiga programs. To help
position each program’s image in the centre of the screen Auto centre can be
enabled.
Enabling Auto centre will cause THEA500 Mini to continually monitor the
position of the image and alter it accordingly, which is most often a vertical
adjustment.
Enabling this option can sometimes result in the image appearing to slide
into place towards the centre of the screen, where it will usually stay. For the
few programs that this happens frequently to, it may be preferable to instead
congure a xed Vertical oset along with a Crop rectangle.
Crop rectangle
To maximise the size of the image and remove the unused and unnecessary
black borders at the top and bottom of the screen, a Crop rectangle can be
congured to dene the region of the image that THEA500 Mini will display.
THEA500 Mini can perform this conguration automatically, and is described
in "Auto crop" on page 23.
The remainder of this section describes how to congure the Crop rectangle
manually, in case you want to make any ne adjustments.